Reccently I did something random in ctxlua. I post it in the hope it will be
useful.
Hans van der Meer
\startluacode
-- Define our namespace as hvdm
hvdm = hvdm or {}
-- Return random series of numbers 1..n depending on the number of
arguments
function hvdm.randomseries (n, straight)
local done = {}
for i = 1, n do
done[i] = i
end
if straight == "false" then
return table.concat(done,",")
end
local result = ""
for i = n, 2, -1 do
local r = math.random(i)
result = result .. done[r] .. ","
table.remove(done,r)
end
result = result .. done[1]
return result
end
\stopluacode
\def\RandomSeed#1{\directlua{math.randomseed(#1)}}
\def\RandomValue{\directlua{tex.print(math.random())}}
\def\RandomRange#1{\directlua{tex.print(math.random(#1))}}
\def\RandomSeries[#1]#2{\ctxlua{tex.print(hvdm.randomseries(#2,"#1"))}%
On 5 jan. 2012, at 21:05, Otared Kavian wrote:
> Hi all,
>
> I need to define numerical coefficients (essentially at random) and then use
> them with commands, say like \CoeffAlpha, \CoeffBeta, and so on.
> More precisely, how can I define the command \RandomCoeff, so that
> \RandomCoeff{Beta}{1}{10} yields a command named \CoeffBeta, which is a
> random number chosen between 1 and 10?
>
> I tried to use the following approach, but could not make it work:
>
> %%% begin random-coeff.tex
> \setuprandomize[2012] % set a seed
>
> \ctxlua{CoeffAlpha = math.random(1,10) ;}
> \def\CoeffAlpha{\ctxlua{tex.print(CoeffAlpha)}}
>
> %%%%%
> \define[3]\RandomCoeff{%
> \ctxlua{a = math.random(#2,#3)}
> % \csname{Coeff#1}\endcsname{\ctxlua{tex.print(a)}} %% this line does not
> work as expected...
> }
>
> \starttext
> \CoeffAlpha
>
> \RandomCoeff{Beta}{1}{10}
>
> \ctxlua{tex.print(a)}
>
> %\CoeffBeta
>
> \stoptext
> %%% end random-coeff.tex
>
> Thanks in advance for any suggestion or hint.
> Best regards: OK
>
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> ___________________________________________________________________________________
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the
Wiki!
maillist : [email protected] / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage : http://www.pragma-ade.nl / http://tex.aanhet.net
archive : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
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